Bimaterial anti-shock system for timepieces
AssigneeThe Swatch Group Research and Development Ltd
InventorsJean-Jacques Born, Jean-Claude Martin
Life of this patent
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Abstract
A shock absorber bearing for an arbor of a timepiece wheel. The arbor includes a pivot-shank, the bearing includes a support including a housing arranged to receive a suspended pivot mechanism, and the pivot mechanism is arranged to absorb, at least in part, any shocks experienced by the timepiece wheel.
Claims16
A shock absorber bearing for an arbor of a timepiece mobile part, the arbor including a pivot-shank and a pivot, the bearing comprising:
- a support including a housing arranged to receive a suspended pivot structure, the pivot structure is arranged to absorb, at least in part, any shocks experienced by a timepiece wheel, wherein
- the pivot structure is made of a metallic material and includes a recess in which is inserted an insert made of synthetic material and with which the arbor pivot cooperates,
- the insert is fitted forcibly in the recess,
- the housing includes an aperture through which the arbor pivot is insertable in an axial direction of the arbor, and
- a maximum width of the insert in a perpendicular direction that is perpendicular to the axial direction is less than a minimum width of the aperture in the perpendicular direction.
A method for fabrication of a shock absorber bearing for an arbor of a timepiece mobile part, the arbor including a pivot-shank and a pivot, the bearing including a support provided with a housing arranged to receive a suspended pivot structure, the method comprising:
- taking the support and the pivot structure including a recess and then placing the pivot structure inside the housing in the support;
- taking the arbor and an insert including a hole to insert the pivot therein;
- placing the insert on the arbor so that the arbor pivot is inserted inside the hole in the insert;
- inserting the arbor pivot with the insert disposed on the arbor pivot together through an aperture of the housing;
- and
- mounting the shock absorber bearing by manipulating the arbor so that the insert mounted on the arbor penetrates the recess.
A method for fabrication of a shock absorber bearing for an arbor of a timepiece mobile part, the arbor including a pivot-shank and a pivot, the bearing including a support provided with a housing arranged to receive a suspended pivot structure, the method comprising:
- taking the support and the pivot structure including a recess and then placing the pivot structure inside the housing in the support;
- taking the arbor and over molding the pivot with a material to form an insert;
- and
- mounting the shock absorber bearing by manipulating the arbor so that the insert on the arbor penetrates the recess.
Dependencies are inferred from the claim text.